<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #header{
            height: 50px;
            background-color: aquamarine;
        }
        #guide{
            height: 100px;
            background-color: beige;
        }
        #focus{
            height: 470px;
            background-color: blueviolet;
        }
        #leftPart{
            height: 470px;
            width: 400px;
            background-color: brown;
            float: left;
        }
        #centerPart{
            height: 470px;
            width: 1040px;
            background-color:chocolate;
            float: left;
        }
        #rightPart{
            height: 470px;
            width: 400px;
            background-color:cornflowerblue;
            float: left;
        }
        #foot{
            height: 250px;
            background-color: darkcyan;
        }
    </style>
</head>
<body>
    <div id="header" align="center">头部</div>
    <div id="guide" align="center">导航栏</div>
    <div id="focus" align="center">焦点图</div>
    <div id="floatPart">
        <div id="leftPart" align="center">左</div>
        <div id="centerPart" align="center">中</div>
        <div id="rightPart" align="center">右</div>
    </div>
    <div id="foot" align="center">底部</div>
</body>
</html>